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Date:      Fri, 5 Feb 2010 21:34:15 +0000
From:      Mike Clarke <jmc-freebsd2@milibyte.co.uk>
To:        freebsd-questions@freebsd.org
Subject:   Re: Newbie gmirror questions
Message-ID:  <201002052134.15945.jmc-freebsd2@milibyte.co.uk>
In-Reply-To: <4B538459.7090601@infracaninophile.co.uk>
References:  <201001152334.52978.jmc-freebsd2@milibyte.co.uk> <201001172122.15128.jmc-freebsd2@milibyte.co.uk> <4B538459.7090601@infracaninophile.co.uk>

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On Sunday 17 January 2010, Matthew Seaman wrote:

> However, one of the really amazingly brilliant things about geom is
> that just about any disk / storage related thing can be a geom
> provider, and geom constructs will nest very happily. =A0Here's a howto
> for setting up gmirror across a pair of slices:
>
> http://people.freebsd.org/~rse/mirror/

Thanks for all the advice, my mirrors are now up and running on 2 of the=20
4 slices without any problems.

But just one last dumb question. Does gmirror consider one of the=20
consumers to act as a "master" for the pair? The reason I ask is that=20
earlier today I needed to disconnect a few cables inside the PC to get=20
better access to a bit of internal hardware and then realised that=20
although I knew which two SATA connectors to use for the mirror drives=20
I'd failed to make a note of which order the drives were connected. I=20
felt about 75% sure I'd paired them up the same way as before so went=20
ahead, everything started up OK and "gmirror status" shows the status=20
for both mirrors as "COMPLETE". Now I'm wondering if I was just lucky=20
or if it just doesn't matter if the order of mirror consumers is=20
interchanged after creation.

=2D-=20
Mike Clarke



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